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Table 6 Summary of proposed survival strategies of the isolates and their possible origin

From: Resilient microorganisms in dust samples of the International Space Station—survival of the adaptation specialists

Isolated microbial genus Possible origin Proposed survival strategy References
Bacillus HA, CR, ISS Endospores [7783]
Paenibacillus CR, ISS Endospores [7881]
Salinibacillus HA, ENV Endospores [40, 84]
Micrococcus HA, CR, ISS, IA Intrinsic desiccation resistance [81, 82, 8588]
Cupriavidus CR, ISS Various DNA-repair mechanisms; adapted to extreme, metal-rich, anthropogenic environments [78, 89]
Methylobacterium CR, ISS, IA Intrinsic desiccation resistance [5, 14, 20, 82, 90]
Bradyrhizobium CR, ISS Intrinsic desiccation resistance [5, 14, 20, 81, 82, 91]
  1. Legend: HA human-associated; CR reported in spacecraft assembly clean room(s) before; ISS reported in ISS before; ENV environmental; IA indoor air